Bhagavad Gita 11.9
सञ्जय उवाच। एवमुक्त्वा ततो राजन्महायोगेश्वरो हरिः। दर्शयामास पार्थाय परमं रूपमैश्वरम्।।11.9।।
sañjaya uvāca| evamuktvā tato rājanmahāyogeśvaro hariḥ| darśayāmāsa pārthāya paramaṃ rūpamaiśvaram||11.9||
sanjaya uvaca evamuktva tato rajanmahayogeshvaro harih darshayamasa parthaya paramam rupamaishvaram11.9
Meaning
Sanjaya narrates to Dhritarashtra: Having spoken thus, the great Lord of Yoga, Krishna, then showed Arjuna His supreme, cosmic form.
संजय ने कहा — हे राजन्! महायोगेश्वर हरि ने इस प्रकार कहकर फिर अर्जुन के लिए परम ऐश्वर्ययुक्त रूप को दर्शाया।
This is verse 9 of 55 in Chapter 11 (Vishwaroopa Darshana Yoga) of the Bhagavad Gita.